public class Demo{
	
	public static void main(String[] args){
		byte num = 0170;
	
		// num 
		System.out.print(num);
		
		System.out.print(num);
		// \n
		System.out.println();
		System.out.print(num);
		
		System.out.println();
		
		System.out.printf("你好,我是%s。今年%d岁,%b", "小张", 20, false);
	}
}